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Application of acetobacter aceti for processing copper-containing etching waste solution

Acetobacter aceti and copper etching technology, which is applied in metallurgical wastewater treatment, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems that affect the removal effect of copper ions and are rarely used, so as to achieve the removal Remarkable effect, reduced processing cost, and low source cost

Inactive Publication Date: 2011-05-11
GUANGZHOU KECHENG ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Micrococcus luteus and Saccharomyces cerevisiae have been disclosed in the prior art to adsorb or precipitate copper ions, but they are rarely used in practical applications.
The main reason is that there are other ions besides copper ions in copper-containing etching waste liquid, such as arsenic, ammonium, lead, mercury, etc. The existence of these ions will affect the removal effect of micrococcus luteus and Saccharomyces cerevisiae on copper ions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Utilize the method for treating waste etching liquid by Acetobacter aceti, comprising the steps:

[0015] (1) Strain cultivation: Acetobacter aceti is inserted into the incubator, and cultured with nutrients containing Fe, S, C, N, and P in the incubator, culture conditions: anaerobic environment, pH7. 0. The temperature is 30°C, and the incubation time is 36 hours.

[0016] (2) Acetobacter aceti and its metabolites and nutrients in the incubator are used as a copper removal agent, and the etching waste liquid (in this etching waste liquid) that the pH value is 3 and the molar concentration of copper ions is 0.2mol / L Contains arsenic, ammonium, lead and mercury ions), according to the volume ratio of 4:1000, pour into the bioreactor for mixing and stirring, the temperature is 30°C, react for 30 minutes, after sedimentation in the sedimentation tank, the supernatant is filtered through the filter, After testing, the copper ion content in the discharged water was reduced...

Embodiment 2

[0019] On the basis of Example 1, the Acetobacter aceti and its metabolites and nutrients in the incubator are used as a copper removal agent, and the aqueous solution with a pH value of 3 and a copper ion molar concentration of 0.2mol / L, by volume The ratio is 4:1000, pour into the bioreactor and mix and stir, the temperature is 30°C, and react for 30 minutes. After sedimentation in the sedimentation tank, the supernatant is filtered through a filter. After testing, the copper ion content in the discharged water is reduced to 0.020mg / L.

[0020] It can be seen that the treatment effect of Acetobacter aceti on copper ions in aqueous solution is equivalent to that in etching waste solution. This shows that the arsenic, ammonium, lead and mercury ions in the etching waste liquid basically do not affect the treatment of copper ions by Acetobacter aceti.

Embodiment 3

[0022] On the basis of Example 1, first adjust the pH value of the etching waste liquid to 7, and then insert Acetobacter aceti into the other unchanged. After testing, the copper ion content in the discharged water was reduced to 0.010mg / L.

[0023] It can be seen that when the pH value is 7, the treatment effect of Acetobacter aceti on copper ions is significantly higher than that when the pH value is 3.

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PUM

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Abstract

The invention discloses application of acetobacter aceti for processing copper-containing etching waste solution. The acetobacter aceti can be directly used for processing the copper-containing etching waste solution, metabolites of the acetobacter aceti in the copper-containing etching waste solution can deposit copper ion, and the copper ion can be eliminated through simple filtration, so as torealize the aim that the copper-containing etching waste solution can be recycled by using the acetobacter aceti. The acetobacter aceti is less affected by the other iron in the copper-containing etching waste solution and has a significant effect for eliminating the copper iron. The acetobacter aceti is widely existed in acescent materials, the corrupt materials can be cultured and enriched withnormal culture medium, and the resource cost of the acetobacter aceti is low, therefore, the invention reduces the processing cost of the copper-containing etching waste solution.

Description

technical field [0001] The invention relates to a treatment technology for copper-containing etching waste liquid, in particular to the application of Acetobacter aceti in the treatment of copper-containing etching waste liquid. Background technique [0002] Printed circuit board (PCB) manufacturing, metal cleaning and surface treatment, inorganic salt production, electroplating, sign making, copper hydrometallurgy and other industries will use copper-containing solutions or produce copper-containing etching waste liquid, the specific copper content of waste liquid The amount is 0.2-200 g / L, which can be divided into acidic system and alkaline system. If these copper-containing etching waste liquids are not treated and discharged directly, they will cause serious environmental pollution problems. The existing conventional treatment methods for heavy metal copper mainly include: chemical precipitation, ion exchange, evaporation and concentration, electrolysis, activated carbo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12N1/38C12N1/20C02F3/34C12S13/00C12R1/02C02F103/16
Inventor 王永成陈伟华
Owner GUANGZHOU KECHENG ENVIRONMENTAL PROTECTION TECH